Dolphin

The Dolphin Nautilus CC scrubs the floor and walls of pools up to 33 feet long, inground or above-ground, with a powered brush. It is one of the lighter wall-climbing Dolphins at 14.8 pounds. In return, it leaves out a timer, an app and waterline cleaning, so each two-hour cycle starts when you switch it on.

The Dolphin Nautilus CC Plus cleans the floor and walls of inground pools up to 40 feet long, and it adds Wi-Fi scheduling through Dolphin’s app, which the plain Nautilus CC does not have. It plugs into a power supply, so there is no battery to charge. Like the CC, it leaves the waterline to you.